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DTC P2635 - keywords calibration cel code control engine fscm fuel ignition LZ4 MIL module pressure program pump reprogram set signal system

Subject:DTC P2635

Models:2008 Saturn Vue
with 3.5 LZ4 engine



The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

This vehicle may have a concern of a DTC P2635 set as current or history in the FSCM. This could possibly be due to a calibration error in the FSCM.

Recommendation/Instructions:

Review "Ignition 1 Signal" voltage in the Freeze Frame Data. If the "Ignition 1 Signal" is greater than 14.8 volts, this code is likely set due to a calibration error.

Clear the P2635 from the FSCM and the associated P069E malfunction codes.

DO NOT REPLACE THE FSCM OR OTHER FUEL SYSTEM COMPONENTRY.

An updated calibration for the FSCM is in process and this PI will be updated when this software is available.

Advise the customer that the vehicle can be driven and that you will contact them when the new calibration becomes available.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.